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Radiative emission from Cu2ZnSnS4/ZnSn core/shell nanocrystals
Helmholtz Zentrum Berlin Mat & Energie, Dept Struct & Dynam Energy Mat, D-14109 Berlin, Germany.
Helmholtz Zentrum Berlin Mat & Energie, Dept Struct & Dynam Energy Mat, D-14109 Berlin, Germany.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.ORCID iD: 0000-0002-8360-1877
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2019 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 7, no 20, p. 6129-6133Article in journal (Refereed) Published
Abstract [en]

Kesterite Cu2ZnSnS4 (CZTS) nanocrystals so far have been found to luminesce neither at room temperature nor at low temperature. Here a core-shell architecture for kesterite CZTS nanocrystals is demonstrated by applying a ZnSn-alloy shell overcoating approach. These CZTS/ZnSn nanocrystals show luminescence emission at 1.05 eV, which is red-shifted by about 0.4 eV from the absorption onset and is attributed to a radiative transition involving a deep defect. Temperature-dependent photoluminescence measurements within a range of 20-200 K indicate the presence of a competing nonradiative channel with an activation energy of 50-60 meV.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019. Vol. 7, no 20, p. 6129-6133
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-390604DOI: 10.1039/c9tc00904cISI: 000472444800027OAI: oai:DiVA.org:uu-390604DiVA, id: diva2:1342244
Available from: 2019-08-13 Created: 2019-08-13 Last updated: 2019-08-13Bibliographically approved

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